I appreciate the rocket launcher part of the video.
I totally don't see the utility of this for the fire-fighting part of the equation. The volume of fire suppressant foam that can be squeezed into a small rocket's payload is somewhere between token amount and laughably small. OTOH, if one launched a Scud-worth of fire suppressant an apartment block, the F = m*a might take down the entire side of the building.
OK for a promo video, not for much else.